46 
THE I.OXDOX CATALOGUE OF BRITISH PLANTS. 
Potamogeton Linn. 462 
(A. Bennett) 
1944 natans Linn.—111 
b. prolixus Koch 
c. rotundifolius Breb. 
d. terrestre Gray 
X polygonifolius 
(gessnacensis Fisch.) 
1945 polygonifolius Pourr. — 112 
b. lancifolius 
Cham. & Schlecht. 
c. cancellatus Fryer— r 
’ d. amphibius Fr. 
X pnelongus (Macvicarii 
Ar. Benn.) — I 
1946 coloratus Hornem. 44 
X heterophyllus 
(Billupsii Fryer) 
X pusillus — I. 
1947 alpinus Balb.— 79 
b. lacustris Marss. 
X heterophyllus 
(gracilis Wolfg.) 
X natans (Drucei Fryer)—2 
X polygonifolius 
(spathulalus Schrad.)— C. 
X pnelongus 
(Palmeri Druce ?) 
1948 lanceolatus Sm.—2 
1949 heterophyllus Schreb.—83 
b. maximus Ar. Benn. 
c. graminifolius (Fr.) 
d. hibernicus Ar. Benn. 
X natans (sparganiifolius 
_ L:est.) 
X polygonifolius (Seemenii 
Asch. & Grab.)— C. 
igSo’pensyWanicus 
Cham. & Schlecht.—1 
1951 falcatus Fryer — 2 
1952 nitens Weber—34 
b. involutus Fryer — 2 
c. subpetiolatus Hagstr. 
d. curvifolius Hartm. 
1953 lucens Linn. — 86 
b. acuminatus Fr. 
C. longifolius DC. — t 
d. insignia Tis.—1 
X natans (fluitans Roth) 
X pnelongus (Babingtonii 
Ar. Benn.) — I 
1934 deeipiens Nolte -19 
b. affinis Ar. Benn. — 2 
c. upsaliensis Tis. 
d. salicifolius Ar. Benn. — 1 
1955 angustifolius Bercht. & Presl 
(Zizii Roth) — 41 
b. lacustris Ar. Benn. — 2 
X natans (crassifolius Fryer) 
1956 Griffithii Ar. Benn.—1 
1957 pnelongus Wulf.—59 
b. angustifolius (Hook.) 
Potamogeton 462— cont. 
1958 perfoliatus Linn.—102 
b. lanceolatus Blytt 
c. ovalifolius Wailr. 
d. rotundifolius Wallr. 
1959 crispus Linn.—103 
b. serratus (Huds.) 
c. acutifolius Fieb. 
d. obtusifolius Fieb. 
X Friesii (Lintoni Fryer)—4 
X perfoliatus 
(Cooperi Fryer)—6 
X pnelongus 
(undulatus Wolfg.)—1 
X pusillus 
(Bennettii Fryer)—1 
1960 densus Linn.—62 
b. angustifolius Wallr. 
c. lancifolius Mert. & Koch 
1961 zosterifolius Schum.—25 
b. latifolius Gray 
1962 acutifolius Link—17 
b. major Fieb. 
X pusillus (sudermanicus 
Hagstr.)—1 
1963 obtusifolius Mert. & Koch—74 
b. tluvialis Lange & Mort. 
1964 Friesii Rupr.—51 
1965 rutilus Wolfg.—2 
1966 pusillus Linn.—108 
1967 panormitanus Biv. Bern.—24? 
b. minor Biv. Bern. 
1968 Sturrockii Ar. Benn.—2 
1969 triehoides 
Cham. & Schlecht.—9 
b. Trimmeri Casp. 
1970 pectinatus Linn. 91 
b. salinus Voch 
f. diffusus Hagstr. 
X filiformis 
(suecicus Richter) 
1971 interruptus Kit. 
(flabellatus Bab.)—6i 
b. scoparius Fryer 
1972 filiformis Pers.—21 
b. alpinus Blytt 
/. luxuriosus Hagstr. 
/. crinisimilis Hagstr.—1 
Ruppia Linn. 463 
1973 maritima Linn. 
(spiralis Hartm.)—17 
1974 rostellata Koch—47 
b. nana Bosw. 
Zannichellia Linn. 464 
1975 palustris Linn.—73 
a. major Bcenn. 
b. pedicellata Fr. 
c. repens Boenn. 
